Ultrasonic imaging broadband signal transmitting and processing method and corresponding system thereof

Abstract

The invention provides an ultrasonic imaging broadband signal transmitting and processing method and a corresponding system thereof. The method comprises the following steps: configuring primitives and transmitting channels on probes to form one-to-one corresponding mapping relations, and ignoring primitives and / or transmitting channels which do not form the mapping relation; and configuring different transmitting center frequencies for the mapping relations according to the distance between the primitives or the transmitting channels with the mapping relations and the transmitting aperture center, wherein the closer the distance between the primitives or the transmitting channels is, the higher the correspondingly-configured transmitting center frequency is. The method configures different emission center frequencies for the mapping relations according to the distance between the primitives or the transmitting channels with the mapping relations and the transmitting aperture center, and can realize broadband signal transmitting; and effectively improves the transverse resolution and penetration power of far-field images, and improves the consistency of the near-field, middle-fieldand far-field images.

Description

technical field [0001] The invention belongs to the field of medical ultrasonic diagnostic imaging, in particular to a method for transmitting and processing ultrasonic imaging broadband signals and a corresponding system. Background technique [0002] Ultrasound imaging has become one of the most widely used clinical diagnostic tools because of its non-invasive, real-time, convenient operation, and low price. The commonly used functional modes of ultrasound imaging include two-dimensional black and white (B) mode, spectral Doppler mode (PW / CW) and color flow mode (CF / PDI). The B mode relies on the amplitude of the ultrasonic echo signal for imaging, and what is obtained is the two-dimensional structure and shape information of the tissue. The greater the echo signal intensity, the greater the gray value of the corresponding image pixel, and vice versa, the smaller the gray value; PW The basic principles of the / CW and CF / PDI modes are the Doppler effect, which rely on the ...

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Problems solved by technology

[0006] In the prior art, a chirp signal is used to modulate the carrier frequency. The signal frequency varies linearly with time and has a large time-bandwidth product. Therefore, a larger bandwidth and higher spatial resolution can be obtained by using a chirp signal; however, the linear Coded transmission methods such as FM signals involve modulation, coding and decoding processing of signals, which have high requirements on hardware, complex systems and high costs. Currently, they are only used in very few high-end ultrasound imaging equipment

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